IIRC, Tandy also made a "Vidoetext" terminal that was in a white version
of the Coco 1 case.
I've always wondered what was inside that Videotex machine. I've not seen
the service manual on the web anywhere, and I've never seen any info in
print. Is it a modified CoCo? Does it even have a 6809 + 6883 (SAM) +
6847 (VDG) in the middile of it?
-tony